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STATE OF WASHINGTON <br />DEPARTMENT OF ECOLOGY <br />1250 W. Aldcr Streer o Union Gap, WA 9(9903-0009 : (509) 575'2490 <br />May 20,2025 <br />Patti Stacey <br />Kittitas County Solid Waste <br />Ellensburg WA 98926-2886 <br />SubJect: Approval of Septage Land Apptication Due to Lngoons Near Capacity <br />Dear Ms, Stacey: <br />This letter serves as formal approval of yow request submitted on May 19,2025 for emergency <br />septage land applications at the Ryegrass septage permitted sitm, due to your septage lagoons <br />reaching a near capacity condition. The approval is granted based on the site specific land <br />application plan dated April 2025 and in accordance with til/AC 173-308-270, sepkge land <br />applied to the land. <br />Approval Summnry <br />o Site Location: sites D-A and D-B, with existing active 2024 ,'inter seeded winter wheat <br />seedlings, and recently added new sites E-A. E-8, and E-C, wittr the active mixture of <br />native vegetation growing (Site Map attached). <br />o Approved Application Area: Sites D-A (6.2 aqes) and D-B (6.2 acres), Sites E-A (7.0 <br />acres). E-B (4.8 acres), and E-C (5.7 acres). <br />. Application Window: As soon as possible. <br />. Application Frequency: Single event. <br />Approved Agronomic Rates <br />Based on soil test results of sites dated IVIay 9,2025, and microgeon needs of winter wheat (81 <br />lbs N/acre/year, with an estimated target grain yield of 30 bushels/acre) (source, WSU extension <br />publication), and 39.5 lbs N/acrelyear of ttre mixture of the native vegetation (source, a local